found: Slobodkina, E. Boris and his balalail, 1964:t.p. (Bobri)
found: Falk, P. Dict. of signatures & monograms, 1988:p. 60 (Bobritsky (Bobri), Vladimir, 1898- )
found: U.S. Social Security death index(Bobritsky, Vladimir, d. 1986)
found: Wikipedia, November 29, 2016(Vladimir Bobri; born May 13, 1898 in Kharkiv, Ukraine; died November 3, 1986 in Rosendale, New York; illustrator, graphic designer, guitar historian and player; served as editor and art director for Guitar Review for 40 years) - https://en.wikipedia.org/wiki/Vladimir_Bobri